Despite the error message an app-file is generated. I have also moved that app-file to iTunes but it wont synchronize with a device (iPhone).

I guess I am missing something.

Also when looking at the app-file, it looks like it contains the whole contents from the source folder, which is much more than is needed to run the app (e.g. css-debug and touch-all-debug). But that is maybe something for later optimization.